The electron in a hydrogen atom is described by the Schrödinger equation. The time-independent Schrödinger equation in spherical polar coordinates can be solved by separation of variables in the form . The radial and angular components are Laguerre and Legendre functions, thus and , respectively. Here, is the first Bohr radius, and are the integers in the ranges (principal quantum number), (angular momentum quantum number), and (magnetic quantum number). The probability of finding an electron at a specific location is given by , where is the normalization constant, such that .